阅读说明：本技术 二次电池和包含二次电池的装置 (Secondary battery and device including the same ) 是由 沈睿 马建军 何立兵 于 2020-03-27 设计创作，主要内容包括：本申请公开了一种二次电池和包含二次电池的装置。二次电池包括正极极片和负极极片,所述正极极片包括正极集流体以及设置在所述正极集流体至少一个表面上且包括正极活性材料的正极膜片,所述负极极片包括负极集流体以及设置在所述负极集流体至少一个表面上且包括负极活性材料的负极膜片,其中,所述正极活性材料包括层状锂过渡金属氧化物及其改性化合物中的一种或几种,所述负极活性材料包括人造石墨和天然石墨,且所述负极极片满足：0.02≤I-(3R(012))/I-(2H(100))≤0.18；或者,所述正极活性材料包括橄榄石结构的含锂磷酸盐及其改性化合物中的一种或几种,所述负极活性材料包括人造石墨和天然石墨,且所述负极极片满足：0.04≤I-(3R(012))/I-(2H(100))≤0.22。(Disclosed are a secondary battery and a device including the same. The secondary battery comprises a positive pole piece and a negative pole piece, wherein the positive pole piece comprises a positive current collector and is arranged on at least one surface of the positive current collector and comprises a positive active material, the negative pole piece comprises a negative current collector and is arranged on at least one surface of the negative current collector and comprises a negative active material, wherein the positive active material comprises one or more of layered lithium transition metal oxide and modified compounds thereof, the negative active material comprises artificial graphite and natural graphite, and the negative pole piece meets the following requirements: i is more than or equal to 0.02 3R(012) /I 2H(100) Less than or equal to 0.18; or the positive active material comprises one or more of olivine-structured lithium-containing phosphate and modified compounds thereof, the negative active material comprises artificial graphite and natural graphite, and the negative pole piece meets the following requirements: 0.04≤I 3R(012) /I 2H(100) ≤0.22。)